JP2002310341A - Fire fighting hose - Google Patents

Abstract

PROBLEM TO BE SOLVED: To provide a fire fighting hose hardly generating a kink. SOLUTION: This fire fighting hose 1 internally fixes a linear layer 3 to a jacket 2 woven cylindrically from a warp 2a and weft 2b, a weaving composition of the jacket 2 is made twilled weave, and a number of placing counts per 50 mm width of the weft is set to 30 or more.

Description

DETAILED DESCRIPTION OF THE INVENTION

[0001]

TECHNICAL FIELD The present invention relates to a fire hose,
More specifically, the present invention relates to a fire hose in which kink is hardly generated.

[0002]

2. Description of the Related Art During a fire fighting operation, a fire hose is extended while connecting one end to a fire hydrant and connecting the required number of fire hoses to the other end sequentially to a fire site. Connect the nozzle to and discharge water. In order to move the nozzle to various places according to the fire situation, the nozzle moves along the ground while dragging the fire hose.

When an extreme bending load is applied to the fire hose for some reason during the fire extinguishing operation as described above, the fire hose is bent in a V-shape on the inner peripheral side of the curved portion of the fire hose 1 as shown in FIG. Kink K may occur. When such a kink K occurs, the water flow area of the fire hose 1 becomes substantially zero or is reduced to a small degree, so that the water flow stops or the water flow rate becomes extremely small. Therefore, there was a problem that the fire extinguishing work could not be performed thereafter.

[0004]

SUMMARY OF THE INVENTION It is an object of the present invention to provide a fire hose which solves the above-mentioned conventional problems and hardly causes a kink.

[0005]

Means for Solving the Problems The present invention for achieving the above object is a fire hose in which a liner layer is applied to a jacket woven from a warp and a weft in a tubular shape, and the woven structure of the jacket is twilled. The number of drivings of the weft per 50 mm width is set to 30 or more.

[0006] The kink which occurs on the curved inner peripheral surface of the fire hose is generated because stress is concentrated at one point corresponding to the V-shaped apex. However, according to the fire hose of the present invention, since the jacket is made of a twill weave, the weaving structure points are reduced as compared with the case of a plain weave, making it easier to disperse the stress, and the number of driving of the weft yarn per 50 mm width is 30. Because the density of the inner surface of the curved hose is not concentrated at one place, the deformation of the inner surface of the curved hose is dispersed and absorbed by a large number of wefts, so that kink is less likely to occur.

Further, when the outer surface of the jacket is coated with a water repellent, the fire hose is not wetted by the water film on the ground and does not cause an increase in frictional resistance due to the wetting, so that the fire hose is dragged around the ground. The bending action due to the frictional force at that time is eliminated, and the kink preventing action can be further improved.

[0008]

DESCRIPTION OF THE PREFERRED EMBODIMENTS In the present invention, a jacket constituting a skeleton of a fire hose is woven from a warp and a weft in a tubular shape, and is woven so that the weave structure is a twill weave. The warp and the weft may be synthetic fibers or natural fibers, and may be filament yarns or spun yarns.

Since the twill structure has a smaller number of texture points than the plain weave structure, when the fire hose is subjected to a bending action, its bending resistance is made small and easy to bend, and the stress is easily dispersed in the longitudinal direction of the hose. For this reason, kink can be hardly generated. Although the structure of the twill weave is not particularly limited, it can be expressed as a twill weave of "hose outside float / hose inside sink", 2/1, 1/2, 2/2, 3/1, 1
Those selected from the group of / 3, 3/2, 2/3, 3/3, 4/1 and 1/4 are preferred. Among them, a 2/1 twill structure is particularly preferable.

Further, in the twill weave, the weft yarns
The number of shots per 0 mm width is 30 or more, preferably 3
Make 5 or more. In a jacket used for a conventional fire hose, the number of wefts per 50 mm width is about 25, so that it is characterized by being denser than this. In this way, the number of wefts per 50 mm width is made denser to 30 or more, so when the fire hose is subjected to a bending action, the deformation of the curved inner surface is not concentrated in one place, but is distributed to a large number of each weft. Can be absorbed. Therefore, in combination with the above-described twill weave structure, kink can be further reduced in the fire hose of the present invention.

The number of wefts to be driven is desirably increased as the nominal diameter increases, depending on the nominal diameter of the hose. That is, in particular, the number of wefts per 50 mm width in a hose having a nominal diameter of 50 mm or more is preferably 35 or more, and more preferably 38 or more. The upper limit of the number of wefts per 50 mm width is not particularly limited, but is preferably set to about 60.

Although the fineness of the weft is not particularly limited, it is preferable to use a yarn of 1100 dtex or more.

In the present invention, it is more preferable that the jacket structure has a twill weave structure as described above, and that the outer surface of the jacket is coated with a water repellent in addition to increasing the number of wefts to be driven. Increase. That is, at the fire site, the ground may be flooded and a water film may be formed, but if the fire hose comes into contact with the water film and the jacket becomes wet, the frictional resistance when dragging the ground increases. Kinks are likely to occur due to extra frictional force from the ground.

If the outer surface of the jacket is coated with a water repellent as described above, the jacket is always kept dry even if it comes into contact with the water film, so that the increase in kink due to the frictional force as described above is eliminated. be able to.

As the water repellent used for coating, silicone is preferred. The type of silicone is not particularly limited, but preferably the main chain is an organosiloxane bond.
Silicone rubber composed of (SiR ₂ O) _{n} is} preferred.

Confirmation of the anti-kinking effect of the fire hose can be easily performed by a measuring method as shown in FIG.

First, the target fire hose is filled with water, and a pressure (water pressure) of 0.4 MPa is applied to the fire hose.
It is sandwiched between the two plates 20 and 20 as shown in FIG. 2, the hose is bent while approaching each other, and the minimum bending radius r immediately before the occurrence of kink is measured (0.4MP).
a corresponds to the water pressure at the nozzle outlet when water is discharged from the fire hose). The smaller the minimum bending radius r is,
This means that the hose is less likely to cause kink.

According to the fire hose of the present invention, the minimum bending radius r can be set to 25 cm or less, more preferably 20 cm or less.

FIGS. 1 (A) and 1 (B) exemplify main parts of a fire hose according to the embodiment of the present invention when water is not passed.

As shown in FIGS. 1A and 1B, the fire hose 1 is configured such that a liner layer 3 is attached to the inner surface of a tubular jacket 2 and a water repellent 4 is coated on the outer surface. Have been. The tubular jacket 2 is woven by arranging a large number of warp yarns 2a in a ring shape in the longitudinal direction of the hose and driving the weft yarns 2b so as to cross them.
The weft 2b is inserted in a spiral manner so as to continuously circulate in the circumferential direction of the tubular jacket 2 in units of 1 to 3 pieces, and forms a twill weave structure.

The liner layer 3 attached to the inside of the jacket 2 is provided as a seal layer. The liner layer 3 is made of a soft resin such as vinyl chloride, polyurethane, or polyester, or natural rubber or synthetic rubber.

The water repellent 4 is used for the fire hose 1 as described above.
Is provided so that the jacket 2 does not become wet by the water when it comes into contact with a water film on the ground. By keeping the jacket 2 always in a dry state, the fire hose 1 can maintain a high anti-kink effect.

[0023]

As described above, according to the fire hose of the present invention, since the jacket is made of a twill weave, the weaving structure points are reduced as compared with the case of a plain weave, so that the stress is easily dispersed, and the width of the weft is 50 mm. Since the number of hits per hit is made as high as 30 or more, deformation of the inner peripheral surface of the hose curve is not concentrated at one place, but is dispersed and absorbed by a large number of wefts, so that kink can be hardly generated.

[Brief description of the drawings]

FIG. 1 shows a main part of a fire hose according to an embodiment of the present invention when water is not supplied, (A) is a front view, and (B) is X in (A).
FIG.

FIG. 2 is an explanatory diagram of a method for measuring a kink preventing effect of a fire hose.

FIG. 3 is an explanatory diagram of a kink generated in a fire hose.

[Explanation of symbols]

 Reference Signs List 1 fire hose 2 jacket 2a warp 2b weft 3 liner layer 4 water repellent K kink

──────────────────────────────────────────────────続 き Continued on the front page (51) Int.Cl. ⁷ Identification symbol FI Theme coat ゛ (Reference) D06M 15/643 D06M 15/643 F term (Reference) 3H111 AA01 BA18 CA52 CB04 CB23 CB29 DA26 DB04 4F100 AK52B BA02 BA07 DG12A GB90 JB06B 4L033 AB05 AC03 AC15 CA59 CA70 4L048 BA01 BB04 CA15 DA24 DA41

Claims (5)

[Claims] 1. A fire hose comprising a jacket woven from a warp and a weft in a tubular shape, and a liner layer applied to the jacket.
Fire hose with 30 or more shots per 0 mm width. 2. The twill weave has a woven structure of 2/1, 1/2, 2
/ 2,3 / 1,1 / 3,3 / 2,2 / 3,3 / 3,4 /
The fire hose according to claim 1, which is one of 1 and 1/4. 3. A hose having a nominal diameter of 50 mm or more,
3. The fire hose according to claim 1, wherein the number of hits per 50 mm width of the weft is 35 or more. 4. 4. The fire hose according to claim 1, wherein the outer surface of the jacket is coated with a water repellent. 5. The method according to claim 1, wherein the water repellent is silicone.
A fire hose according to any one of claims 1 to 4.